h1,h2,h3,h4,h5,h6,ul,li,ol,table,tr,td,div,body{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
ul{
  list-style: none;
}
body{
  overflow: hidden;
}

.pullLeft{
  float: left;
}
.pullRight{
  float:right;
}
.clearfix::after{
  content:'';
  display: block;
  clear: both;
}